Yes, but even researches have their flaw's and mistakes. This one too could have mistakes. But I feel like most people here, dont look at it from correct PoV. Like, the first thing you would think of when saying "best dueling spec", most people would say "rogue, mage, druid, or warrior" because they A: Watched alot of sodapoppin, hansol, swifty or sensus and they think those classes are op, or B: They play those classes.
That's why alot of people here disagree with the statistics. Just my 5 cents. :)